:root {
    color-scheme: dark;
    --bg: #000;
    --surface: #121212;
    --surface-soft: #181818;
    --surface-hover: #232323;
    --panel: #0f0f0f;
    --panel-border: rgba(255, 255, 255, 0.08);
    --text: #fff;
    --muted: #b3b3b3;
    --muted-strong: #d6d6d6;
    --accent: #1ed760;
    --accent-dark: #17af4d;
    --shadow: 0 22px 70px rgba(0, 0, 0, 0.36);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow: hidden;
}

button,
input {
    font: inherit;
}

button {
    border: 0;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

.app {
    display: grid;
    grid-template-rows: minmax(0, 1fr) auto;
    gap: 8px;
    height: 100svh;
    padding: 8px;
    background:
        radial-gradient(circle at top right, rgba(30, 215, 96, 0.14), transparent 32rem),
        var(--bg);
}

.layout {
    display: grid;
    grid-template-columns: clamp(260px, 25vw, 340px) minmax(0, 1fr);
    gap: 8px;
    min-height: 0;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 0;
}

.sidebar-card,
.main,
.player {
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: var(--surface);
}

.brand-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 76px;
    padding: 18px 20px;
}

.brand {
    display: inline-flex;
    align-items: center;
}

.logo {
    width: 132px;
    filter: invert(1);
}

.sidebar-close,
.menu-button {
    display: none;
}

.nav-card {
    display: grid;
    gap: 4px;
    padding: 10px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 48px;
    width: 100%;
    border-radius: 6px;
    padding: 0 12px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    text-align: left;
    transition: background 160ms ease, color 160ms ease;
}

.nav-link img,
.section-heading img,
.search img,
.icon-button img,
.play-button img {
    width: 20px;
    height: 20px;
    filter: invert(1);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
    background: var(--surface-hover);
    color: var(--text);
}

.library-card {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
    padding: 18px 12px 14px;
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 8px;
}

.section-heading h2 {
    font-size: 1rem;
    font-weight: 750;
}

.library-list {
    display: grid;
    align-content: start;
    gap: 6px;
    min-height: 0;
    overflow-y: auto;
    padding-right: 2px;
}

.library-song {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    width: 100%;
    border-radius: 6px;
    padding: 8px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    text-align: left;
    transition: background 160ms ease;
}

.library-song:hover,
.library-song:focus-visible,
.library-song.active {
    background: var(--surface-hover);
}

.library-thumb {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--accent), #2d46b9);
}

.library-thumb img {
    width: 20px;
    height: 20px;
    filter: invert(1);
}

.song-title,
.song-artist,
.song-meta,
.card-title,
.card-artist,
.card-meta,
.track-copy p,
.track-copy span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-title,
.song-artist,
.song-meta,
.card-title,
.card-artist,
.card-meta {
    display: block;
}

.song-title {
    font-size: 0.92rem;
    font-weight: 720;
}

.song-artist {
    margin-top: 2px;
    color: var(--muted);
    font-size: 0.8rem;
}

.song-meta {
    margin-top: 2px;
    color: #8c8c8c;
    font-size: 0.72rem;
}

.empty-state {
    padding: 24px 10px;
    color: var(--muted);
    font-size: 0.9rem;
}

.cards .empty-state {
    grid-column: 1 / -1;
}

.legal-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    margin-top: auto;
    padding: 8px;
}

.legal-links a {
    color: var(--muted);
    font-size: 0.7rem;
    line-height: 1.4;
}

.legal-links a:hover {
    color: var(--text);
}

.main {
    min-width: 0;
    min-height: 0;
    overflow-y: auto;
    background:
        linear-gradient(180deg, rgba(30, 215, 96, 0.18), transparent 260px),
        var(--surface);
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 5;
    display: grid;
    grid-template-columns: auto minmax(180px, 440px) auto;
    align-items: center;
    gap: 16px;
    min-height: 72px;
    padding: 12px 20px;
    background: rgba(18, 18, 18, 0.82);
    backdrop-filter: blur(18px);
}

.topbar-left,
.history-buttons,
.account-actions,
.control-buttons,
.volume-control {
    display: flex;
    align-items: center;
}

.topbar-left {
    gap: 12px;
}

.history-buttons {
    gap: 8px;
}

.icon-button,
.circle-button,
.play-button {
    display: inline-grid;
    place-items: center;
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    color: var(--text);
    cursor: pointer;
    transition: transform 160ms ease, background 160ms ease, opacity 160ms ease;
}

.circle-button {
    width: 36px;
    height: 36px;
}

.icon-button:hover,
.circle-button:hover,
.play-button:hover,
.icon-button:focus-visible,
.circle-button:focus-visible,
.play-button:focus-visible {
    background: rgba(255, 255, 255, 0.14);
    transform: scale(1.04);
}

.search {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    height: 46px;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0 16px;
    background: #242424;
    transition: border-color 160ms ease, background 160ms ease;
}

.search:focus-within {
    border-color: rgba(255, 255, 255, 0.32);
    background: #2a2a2a;
}

.search img {
    flex: 0 0 auto;
    opacity: 0.7;
}

.search input {
    min-width: 0;
    width: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--text);
}

.search input::placeholder {
    color: var(--muted);
}

.account-actions {
    justify-content: end;
    gap: 10px;
}

.signup-button,
.login-button {
    min-height: 42px;
    border-radius: 999px;
    padding: 0 18px;
    cursor: pointer;
    font-weight: 750;
    transition: transform 160ms ease, color 160ms ease, background 160ms ease;
}

.signup-button {
    background: transparent;
    color: var(--muted);
}

.signup-button:hover,
.signup-button:focus-visible {
    color: var(--text);
    transform: scale(1.03);
}

.login-button {
    background: var(--text);
    color: #000;
}

.login-button:hover,
.login-button:focus-visible {
    transform: scale(1.03);
}

.content {
    padding: 26px 24px 32px;
}

.page-title {
    margin-bottom: 22px;
}

.page-title p {
    color: var(--muted-strong);
    font-size: 0.9rem;
    font-weight: 700;
}

.page-title h1 {
    margin-top: 4px;
    font-size: clamp(2rem, 5vw, 4.25rem);
    line-height: 1;
    letter-spacing: 0;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 16px;
}

.track-card {
    min-width: 0;
    border-radius: 8px;
    padding: 14px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    cursor: pointer;
    text-align: left;
    transition: background 160ms ease, transform 160ms ease;
}

.track-card:hover,
.track-card:focus-visible,
.track-card.active {
    background: rgba(255, 255, 255, 0.11);
    transform: translateY(-2px);
}

.cover-wrap {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 6px;
    background: #202020;
    box-shadow: var(--shadow);
}

.cover-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-play {
    position: absolute;
    right: 10px;
    bottom: 10px;
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 160ms ease, transform 160ms ease, background 160ms ease;
}

.card-play img {
    width: 18px;
    height: 18px;
    filter: invert(1);
}

.track-card:hover .card-play,
.track-card:focus-visible .card-play,
.track-card.active .card-play {
    opacity: 1;
    transform: translateY(0);
}

.card-title {
    margin-top: 14px;
    font-size: 1rem;
    font-weight: 760;
}

.card-artist {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.86rem;
}

.card-meta {
    margin-top: 6px;
    color: #8d8d8d;
    font-size: 0.74rem;
}

.player {
    position: sticky;
    bottom: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: minmax(180px, 1fr) minmax(320px, 1.5fr) minmax(150px, 0.75fr);
    align-items: center;
    gap: 20px;
    min-height: 96px;
    padding: 14px 18px;
    background: rgba(16, 16, 16, 0.96);
}

.now-playing {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.cover {
    width: 56px;
    height: 56px;
    border-radius: 6px;
    object-fit: cover;
}

.track-copy {
    min-width: 0;
}

.track-copy p {
    font-size: 0.95rem;
    font-weight: 760;
}

.track-copy span {
    display: block;
    margin-top: 3px;
    color: var(--muted);
    font-size: 0.8rem;
}

.player-controls {
    display: grid;
    justify-items: center;
    gap: 10px;
    min-width: 0;
}

.control-buttons {
    gap: 14px;
}

.play-button {
    width: 46px;
    height: 46px;
    background: var(--text);
}

.play-button img {
    filter: none;
}

.play-button:hover,
.play-button:focus-visible {
    background: var(--accent);
}

.timeline {
    display: grid;
    grid-template-columns: 42px minmax(120px, 1fr) 42px;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 640px;
    color: var(--muted);
    font-size: 0.76rem;
    font-variant-numeric: tabular-nums;
}

.timeline span:last-child {
    text-align: right;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
    cursor: pointer;
}

.volume-control {
    justify-content: end;
    gap: 10px;
    min-width: 0;
}

.volume-control input {
    max-width: 130px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-thumb {
    border: 3px solid transparent;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.28);
    background-clip: padding-box;
}

::-webkit-scrollbar-track {
    background: transparent;
}

@media (max-width: 980px) {
    body {
        overflow: auto;
    }

    .app {
        min-height: 100svh;
        height: auto;
    }

    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 20;
        width: min(86vw, 340px);
        padding: 8px;
        background: var(--bg);
        transform: translateX(-105%);
        transition: transform 220ms ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-overlay {
        position: fixed;
        inset: 0;
        z-index: 15;
        background: rgba(0, 0, 0, 0.62);
    }

    .sidebar-close,
    .menu-button {
        display: inline-grid;
    }

    .main {
        min-height: calc(100svh - 114px);
    }

    .topbar {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .account-actions {
        display: none;
    }

    .player {
        grid-template-columns: minmax(160px, 1fr) minmax(260px, 1.5fr);
    }

    .volume-control {
        display: none;
    }
}

@media (max-width: 680px) {
    .app {
        gap: 0;
        padding: 0;
    }

    .layout {
        min-height: 0;
    }

    .main,
    .player {
        border-right: 0;
        border-left: 0;
        border-radius: 0;
    }

    .topbar {
        grid-template-columns: 1fr;
        gap: 10px;
        min-height: auto;
        padding: 12px;
    }

    .topbar-left {
        justify-content: space-between;
    }

    .history-buttons {
        display: none;
    }

    .search {
        height: 44px;
    }

    .content {
        padding: 20px 14px 24px;
    }

    .page-title {
        margin-bottom: 16px;
    }

    .cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .track-card {
        padding: 10px;
    }

    .card-play {
        width: 40px;
        height: 40px;
        opacity: 1;
        transform: translateY(0);
    }

    .card-title {
        font-size: 0.9rem;
    }

    .card-artist {
        font-size: 0.78rem;
    }

    .player {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 12px;
    }

    .now-playing {
        grid-template-columns: 48px minmax(0, 1fr);
    }

    .cover {
        width: 48px;
        height: 48px;
    }

    .player-controls {
        gap: 8px;
    }

    .timeline {
        grid-template-columns: 36px minmax(90px, 1fr) 36px;
        gap: 8px;
    }
}

@media (max-width: 400px) {
    .cards {
        grid-template-columns: 1fr;
    }
}